Condenser winding machine



T. AcKLl-:Y 2.199.603 coNDENsER wINDING MACHINE- Fild July 22, 193e v sheets-sheet 1 May 7, 194.0.

' nvenfor Tomas He/ey,

May 7, 1940.

May 7, 1940.

T. AcKLt-:Y

CONDENSER WINDING MACHINE Filed July 22, 1936 v sheets-sheet s l IIIIIIHH u 4 nventor T/Lma C/ble Cttorneg May 7, 1940. T ACKLEY coNDENs-ER yWINDING MACHINE nventor Thomas c/'ey,

EN- NNN Filed July 22, 1936 7 Sheets-Sheetli May 7, 1940. T. ACKLEY coNDENsER wINDING MACHINE Filed July 22, 1936 7 Sheets-Sheet 6 Snventor L' L ey.

Thomas Ac attorney May 7,-1940. T. AcKLEY CONDENSER WINIHNG MACHINE Filed July 22, 1936 7 Sheets-Sheet 7 :inventor Hamas ch ley Bg j (Itfomeg Skill!!! S com Patented May 7, 1940 UNITED sTATEs PATENT oEFlcE CONDENSED WlNDlNG MAGHINE u Thomas Ackley, Philad Pa-Iililnorto elphia, Radio Corporation of Amex-ica, a'corporation o! Delaware application .my 22,1936, sem No. 91,832

V2s claims. (ci. 242-56) A This invention relates to the manufacture of electrical condensers, and has for its principal object the provision of an improved condenser wind-4 the machine to produce condensers of various sizes are 'readily effected, (4) needed adjustments of the apparatus are readily made. during its operation, and (5) a number yof differentl condensers are simultaneously produced by the same machine.

As hereinafter explained, the machine operates successivelyto (l) close an automatic mandrel for gripping the ends of the paper and metal foil strips, (2) rotate the shaft for Winding the paper and foil on it, (3) disengage the paper and foil feed rollers to permit the paper-and foil to be drawn forward by the mandrel, (4) engage the paper and foil feed rollers so asto be ready to receive and feed the foil and paper strips, (5) cut the foi1 which is fed" slower than the paper for securing proper overlap of the paper and foil'at the beginning and end of the condenser, (6) cut off tlie paper, (7) apply a sticker to seal the outer turns of paper together, (8) stop the automatic mandrel, (9) ejectthe completed condenser, and (10) open the automatic mandrel to receive the ends of the paper and foil for rewinding the next succeeding condenser. f Other. objects and advantages of the invention are the provision of an improved and compact condenser winding mechanism which may be utilized simultaneously to wind a plurality of condensers, -`the provision of means for readily adjusting the capacity of the condensers automatically produced by the machine and the provision of readily accessible means for adjusting the various `partsof the mechanism properly to align and otherwise ,direct and control the movement of the paper and foil strips during the winding operation. This makes possible a very considerable reduction in the time required to set up the machine for condensers of different capacities.

The invention will be better understood from the following description when considered in connection with the accompanying drawings and its scope is indicated by the appended claims.

Referring tothe drawings:

Fig. 1 is a view facing one of the two identical control panelsv mounted at opposite sides of the machine for simultaneously winding a pair of similar condensers,

Figs:2 and 3 are sectional views taken on lines 2 2 and 3-3 of Fig. l,

Figs. 4 to 10 illustrate various features of the drive mechanism,

Figs. 11 and 12 show variousdetails of the automatic mandrel and its operating mechanism. Figs. 13 and 14illustrate the brake, adjusting and automatic protectivemechanism of the strip feed and guide rollers, and

Fig. 15 is a wiring diagram,v of the system 'through which operation of the machine is controlled.

As shown by Figs. 1 and 2,4 the framework of I the machine includes a pair of upright members 20 and 2| between which extend crosspieces 22 and upon which are rotatably mounted a plurality of paper reels 23 to 34 and a pair of metal foil reels 35 and 36. Also mounted on the upright members 20 and 2| are a plurality of control knobs 35A, 36A and 31 to 46 for endwise adjustment of the paper reels 23 to 34, a pair of similar control knobs 4 1 and 48 for endwise adjustment of the foil reels 35 and 36, a drive motor control switch knob 49 and a control knob 50 for adjusting the capacity of the condenser to be wound. Itshould be noted thatFig.2 is a secrollers 61 to 10 for feeding a strip of adhesive tape from a roll 1| to the periphery of the completed condenser, a cutter'12 being arranged to sever the tape in proper lengths forsealing together the outer layers of the condenser.l

Bearing in mind the features thus far described, it will be readily understood that (1) paper is fed from the reels 23 to 25 to the mandrelv 6| on one side of the foil supplied from the reel 35, (2) paper is fed from the reels 26 to 28 to the mandrel 6| on the opposite side of this foil, (3) paper is fed from the reels 29 to 3| to the mandrel lilv on one side of the'foil supplied from the reelv 36 and (4) 'paper is fed from the reels 32 to 34 to the mandrel 6| on the opposite side of this foil. These various reels are so aligned with one another that ythe centers of the paper' strips are substantially midway between the ends of the condenser and the centers of the foil strips are spaced in opposite directions from the centerof the condenser so that an edgeof one foil strlp.

is exposed at one end of the condenser and one edge of the other foil strip is exposed at the opposite end of the condenser. The capacity and consequently the size of. the condenser is determined by the adjustment of the knob 50.

The mechanisms for coordinating the functions of the above described" elements are vshown in Figs. 3 and 5 to 12 which are now to be considered in detail.

The main drive mechanism includes a motor 15 (Fig. 3) which operates through a sprocket 16, a chain 11 and a sprocket 18 to drive a shaft 19. Mounted on the oppositev end of the shaft 19 (Fig. 5) is a gear 80 which is coupled to a shaft 8l through gears 82 and 83. -The shaft 8| bears at its opposite end a miter gear 84 meshing with a similar gear 85 mounted on a shaft 86 which bears a worm 81 (Fig. 3) and through this worm drives a worm gear 88 fixed to a collar 88A rotatably mounted on the shaft 89 and arranged to drive this shaft through a clutch |02|03 the member |02 being fixed to the shaft 89.

The control shaft 89 is the heart of the operating mechanism for the reason that it has mounted on it (1) a cam member 90 which operates through a follower 9| and a rack 92 to operate the foil cutter 51--58 and to operate the paper cutter 59--60, (2) a cam 93 (Fig. 6) which operates through a follower 94 to control operation of the automatic mandrel 6|, (3) a cam 96 which operates through a collar 91 on a shaft 98 to disengage foil feed rollers 5| and 54 and through a shaft 99 to disengage the paper feed rollers 55 and 56, (4) a cam |00 which operates through a follower |0| to stop rotation of the automatic mandrel 6|, (5) a clutch |02|03 coupled to a control solenoid |04 through a bell crank |05 and a rod |06, and (6) a cam |01 which operates through an extension |08 xed to the crank |05 to predetermine operation of the clutch |02-|03.

How these various functions are effected and timed with respect to one another will be readily understood. Thus starting at the beginning of the winding operation, 1) the cam 93 functions to close the' mandrel 6| and gripthe ends of the paper and foil strips, (2) the cam 96 functions to disengage the foil and paperfeed rollers, (3) the cam |01 functions to open the clutch |02- |03 and stop rotation of the control shaft 89, and (4) the mandrel 6| is driven from the shaft 86 `through a chain ||0 (Fig. 3), av shaft a slip clutch ||2| I3, and gears ||4 and I|5 (Fig. 11) to wind the condenser.

When the condenser has been wound to a capacity determined by the setting of the knob 50 (Fig. 1), (1) the solenoid |04 (Fig. 5) is energized to close the clutch |02|03 and start rotation of the control shaft89, (2) the cam 96 functions to engage the foil and paper feed rollers, (3) the cam operates through the rack 92 and its assoelated gears ||6 and ||1 first to cut the foil and second to cut the paper so as to overlap the cut ends of the foil, (4) the cam |00 operates through follower |0I and the clutch member ||2 to stop rotation of the mandrel 6| (5) the rollers 6'Iv to 10 function to applya strip of adhesive tape to the periphery of the condenser, and (6) the cam 93I` operates through the lever systems of Figs. 11 and 12 to discharge the finished condenser and open the mandrel 6|. p

Although not necessary to an understanding of the above described operations, a complete and full disclosure of the invention requires a more detailed explanation of the mechanisms interposed between (1) the cam 96 and the foil and paper feed rollers, (2) the cam 93 and the mandrel, for opening the mandrel, and (3) the cam |00 and the mandrel drive shaft. A detailed description of the electrical control and drive system is also required for a complete understanding of how the condensers of any desired capacity.

machine is made to produce K As shown more clearly in Figs. 6 and 8, the cam 96 operates through the shaft 98 and levers |20 pivoted at one end to the shaft 98 and at the other end to the ends of members |2| (pivoted to supports |22) to control engagement and disengagement of the foil feed rollers 5| and 52 and 53 and 54. The cam 96 also operates through the shaft 99 and the resiliently mounted support |28 of a gear |24 (Figs. 4 and 5) fixed to a shaft 99 to disengage the paper feed rolls 55 and 56. Mounted on the same shaft |21 as the gear |26 is a bevel gear |28 which is driven from the worm gear 88 through gears |294 and |30, shaft |3| and a bevel gear |92. Viilso mounted on the shaft |21 is a gear |33 (Fig. 6) from which the foil feed rollers are driven through gears |34 to |31.

During the winding of the condenser, the cooperative foil feed rollers 5|-52 and 53-54 and the cooperative paper feed rollers 55-56 are 'disengaged and the foil and paper strips are drawn from their respective reels at a.compara tively high rate of lspeed by the mandrels 6|. Since these feed rollers are driven through slip-clutch couplings (Fig. 4) at a lower rate of speed. their engagement serves (1) to subject the foil and paper strips to a tension which facilitates their cutting and (2) to feed the severedends of the strips to the mandrel 6| at a slow enough speed to allow time for completion and ejection of the previously wound condenser.

The mechanism for operating the foil cutters 51 and 59 and the paper cutter 59-60 includes the cam 90 (Figs. 5 and 9) which operates through the follower 9| and a link 9|A pivoted at 9|B to reciprocate the rack 92 in its bearing 9|C. It will be noted that (1) the rack 92 meshes with a gear ||6 mounted on the shaft ||6A of the foil cutter 51 and with a gear ||1 mounted on the shaft ||1A of the paper cutter member 59, (2) the 'gear |6 meshes with and drives a gear ||6B mounted on the shaft I |6C of the foil cutter 58 and (3)'"the gear ||1 operates through a gear |n|1B (also mountedpn the shaft ||1A) to drive a gear ||1C mounted on the shaft ||1D of the paper cutter member 80.

The operation of this mechanism is controlled a part a of its rotation to effect cutting of the foil strips and through a' part "b" of its rotation to eiect cutting of the paper strips, these various operations being so related that the paper strip ends extend beyond the ends of the foil strips.

As previously indicated (1) each of the mandrels 6| is driven from the shaft 86 (Fig. 3) through a chain I0, shaft I I, av gear I4 mounted on the friction driven member ||4 of a clutch I by thecam 90 (Fig. 9) which operates through denser and gripping the foil and paper ends of 'l the condenser next to be wound is controlled by the cam 93 which operates through its follower 94 and'levers |39 to |48 (pivoted together as shown in Figs. 11 and 12) to slide the spindle shafts |44 and |45 endwise from one another in opposite directions to free the completed condenser which is discharged between the plates |46 and |41. During this endwise movement of the shafts |44 and |45l the resiliently pivoted either direction against the tension of a spring members |48 and |40 ride under the guides |60 and |6| and the spindle is maintained in an almost closed position. During thereturn movement of the shafts |44 and |45, however, the

above and need not be repeated here. Figs. 13 and 14 indicate (1) how endwise ad.

justment of the foil and paper reels 23 to 36 (Fig. 1) is effected by means of the control knobs 35A, 36A and 31 to 46, (2) how braking.

action is applied to these reels, and (3) how the machine is stopped in response to breakage of one of the strips.

Thus, rotation of the control knob 35A, for example operates through miter gears |55 and |56, a shaft |51, a bifurcated wedge shaped member |58 and a pin |53 to move the shaft |6| in Surrounding the hub of the reel 25 is a brake band |62 xed at one end to a member |63 pivoted at the lower end of a member |64 which is xed to the shaft |6I. At the 'other end the brake band is xed to the member |64. An electrical contact I66A is mounted on the insulation member |68 which is stationary. An adjustable stop |65 is mounted on the member |64. Rotatably supported at the lower end of the pivotally supported member |63 is a roller |61 and interposed between the member |63 and an extension IBB-|63 of the member |64 is a spring |10. The reel 25 rotates upon a roller bearing fixed to the end of the stationary shaft |6l.

Since the brake band |62 is attached to the upper end of the member |63 and this member is pivoted at a point intermediate the point of the brake attachment and the roller |61, it will be apparent that movement ofthe roller |61 to the left will loosen the brake band and that movement of the roller in the opposite direction will tighten the brake band. When the stripbreaks, the member |63 is of course moved into engage-` ment with the contact |66A by means spring I 10. These contacts are connected in the control circuit of the drive motor 15 and function to stop this motor in response to breakage of the strip. For the purpose of controlling the operation of the motor under these conditions, there may be employed any suitable means such as the relay 15A (Fig. 13) and a source 15B from which it is energized.

With this construction, it will be apparent that (1) lthe pressure of the brake is controlledA in response to the tension of the strip passing from the reel 25 over the roller |61 and (2) the member |63 is moved into engagement with the contact |66A when the strip breaks, thus stopping the machine. Two important advantages are realized from this constru'ction. In the iirst place, 'the brake band pressure is increased in response to decrease in the tension of the paper and vice versa, thus maintaininga sub ntially constant tension irrespective of the s' of the roll. This, of course, applies to all the strip feed rollers. In the second place, static electricity and its consequent disadvantages are Aavoided by eliminating all frictional contact with the strips, as they'pass through the machine. As will be readily understood, the machine operates to pro` duce condensers of substantially identical ca-z arcanos of the erances in its product.

The electrical control circuit of Fig. 15 includes an oscillator |65 (Fig. 15) which may be tuned Vto a frequency of 1000 cycles, is Aenergized from a socket power unit |66 and is coupled tothe input terminals of a bridge network' |61 through A'an amplier |68, a coupling transformer |63, a push-pull amplier |10 and a transformer |1I. Interposed between the transformer |1I. and the pacity, thus avoiding the necessity of large toibridge |61 are a voltagecontrol switch |12, al

voltmeter |13 and a switch |14 associated with a plurality of compensating resistors connected'to the various secondary leads of the transformer.

The bridge |61 consists of an arm including a resistor |15, an arm including adjustable resistors |16 to |18, an arm including a capacitor |19 and an arm connected through terminals 8| and |82 -to the terminals of the condenser or oondensers being wound by the machine.

'I'he output potential of the bridge |61 is applied to the operating coil |83 of clutch solenoid |04 through a channel including amplifiers |84 and |85, a rectier |86, a resistor |81 and an amplifier |88. Connected in the input circuit in series with fthe resistor |81.is an adjustable re' sistor |89 which is supplied with current through a rectier |3| from the same socket power unit |30 as the amplifier channel.

With these connections, lthe output current of the bridge |61 is controlled by the capacity of the-condenser which is being wound and which is connected to the bridge terminals |8||82 (Figs.

l and l5). This output current is amplified by the channel |84 to |06 andappears in the resistor |01 as a direct current which decreases as the capacity of the condenser increases. The control grid of the output amplifier is therefore subjected to a negative bias potential component which becomes less negative as the capacity of the condenser increases. It is also subjected to a positive bias potential component which may be vadjusted by means of the adjustable terminal movable. laterally and axially to and from one another for gripping the ends of insulation and conductive strips to be wound upon it to form a fording a continuous measure of the instantaneous capacity between said strips, and. means operable in response to saidcapacity for terminating the winding of said roll and separating said members to discharge said roll'from said apparatus.. l

2. Ina condenser Winding apparatus including amandrel and means for supplying insulation and conductive strips to be wound on said manclrelA to form a roll in which said insulation strips are interposed between said conductive strips, means affording a continuous measure of the instantaneous capacity between said con- `a mandrel provided with a pair of members 'roll in which saidinsulation strips are interl .posed between said conductive strips, means afductive strips, and the combination of means operable in response to the capacity between said conductive strips for severing said conductive and insulation strips with the ends of said insulation strips overlapping the endsof said conductive strips.

3. A condenser winding apparatus including a mandrel' provided with members movable laterally and longitudinally with respect to one another for gripping the ends of insulationand inductive strips to be wound on said members in the form of .a roll, a control shaft, and means mounted on said shaft for controlling the positions of said members.

l 4. A condenser winding apparatus including a mandrel provided with members movable laterally and longitudinally with respect to one another for .gripping the ends of insulation and inductive strips to be 4wound on said members in the form of a roll, a control shaft, and means includinga cam mounted on said shaft for controlling the positions of said members.

5. A condenser winding apparatus including a mandrel provided with members movable laterally and longitudinally for gripping the ends of insulation and inductive strips to be wound on said members in the form of a roll, a control shaft, means mounted on said shaft for controlling the positions of said members, means af- Ifording acontinuous measure of the instantaneous capacity of said condenser, and means operable to control the rotation of said shaft in .ing the ends of response to said capacity.

6. AV condenser winding machine including power supply means, a mandrel comprising a pair of movable members, a coupling interposed between said meansand said mandrel, means for deriving the instantaneous capacity of said condenser during its winding operation, and means operable in response to a predetermined value of said capacity to stop rotation of saidmandrel and impart longitudinal and lateral movement to said members. 4

'7. A condenser winding machine including means affording a continuous indication of the capacity of said condenser during its winding operation, a mandrel comprising a pair of rotatable members movable laterally and longitudinally with respect to one another, means for feedthe conductive and insulation strips of said condenser between said members, and means operable in response to said capacity to move said members laterally toward one another to grip the ends of said strips.

8. A strip winding machine including a drive motor, means including a control Vshaft operable from saidmotor .to sever said strip, amandrel arranged to be driven from said motor independently of said shaft and comprised ofv a pair of rotatable members, and means operable from said control shaft to move said members axially and longitudinally with respect to oneanother laterally from and toward the end of said strip,

9. A strip winding machineI including a drive motor, means including a control shaft operable from said motor to sever said strip, a mandrel arranged to be driven from said motor independently of said shaft and comprised of a pair of rotatable members, and means operable `from said control shaft to stop rotation of said mandrel and to move said members laterally and longitudinally from and toward one another to grip the end of said strip.

10. In a condenser winding machine including drel members to engage one another to grip` its winding operation, means operable in re;

sponse to a predetermined value of said capacity to close said clutch, and means operable from said-shaft to stop rotation of said mandrel.

l1. A condenser winding machineincluding a drive motor, meansA including a control shaft operable to sever successively the conductive and insulation strips of said condenser, a clutch interposed between said motor and said shaft, a mandrel arranged to be driven from said motor independently of said shaft andv comprised of a pair of rotatable members movable laterally and longitudinally with respect to one another, means affording a continuous measure of the instantaneous capacity of said condenser during its winding operation, means operable in response to a predetermined value of said capacity to close said clutch, and means operable from said shaft to move said members laterally from and toward one another to grip said strips.

` 12. A strip winding machine including a drive motor, means including a control shaft Aoperable from saidmotor to sever said strip, a clutch interposed between said motor and said shaft, a mandrel arranged to be drivenv from said motor independently of said shaft and comprised of a pair of rotatable members, a friction 'coupling interposed between said motor and said mandrel, and means operable from said control shaft to stop said mandrel and to move said members lat-I l erally and axially from and toward one another tween conductive strips separated by strips of y insulation,'the combination of a shaft, a clutch mounted on said shaft and arranged to be'closed in response to said capacity, a mandrel includ- `ing separable otatable `members arranged to be driven with said shaft, conductive and insulation strip feed rollers arranged to be driven with said shaft, means responsive to operation of said clutch for successively moving said manthe ends of said strips, initiating rotation of said mandrel, disengaging said strip4 feed rollers, engaging said feed rollers, cutting. said conductive and insulation strips one after the other, stopping rotation of said mandrel, and separating said mandrel members, and means to open said clutch after` the winding of said coil is initiated.

14. In a condenser winding machine of the type wherein the winding operation is terminated in response to 'a predetermined capacity `between conductive strips separated by stripsof insulation, the combination of a shaft, a clutch mounted on said shaft and arranged to be closed in response to said capacity, a mandrel including laterallyl separable rotatable members varrangedto be driven with'said shaft, conductive and insulation feed rollers arranged to be driven with said shaft, means responsive to operation ofJ said clutch for successively moving said mandrel members to engage the ends of said strips, initiating rotation of said mandrel, disengaging. said strip feed rollers,engaging said feed rollers, cutsponse to said capacity,

' arating said mandrel members, and means to ting said conductive andinsulation strips one afterthe other, stopping rotation of said mandrel, and laterally separating said mandrel members, and means to open said clutch after the winding of said coil is initiated.

15. In a condenser winding machine of the type wherein the winding operation is terminated in response to a predetermined capacity between conductive strips separated by strips of insulation, the combination of a shaft, a clutch mounted on said shaft and arranged to be closed in response to said capacity, a mandrel including separable rotatable members arranged to be driven with said shaft, means responsive to operation of said clutch 'for successively moving said mandrel members to engage the ends of said strips, initiating rotation of said mandrel, stopping rotation of said mandrel, and separating said mandrel members, and means to operate said clutch after the winding of said coil is initiated.

, 16. In a condenser winding machine of the type wherein the winding operation is terminated in response to a predetermined capacity between conductive strips separated by strips of insulation, the combination of a shaft, a clutch mounted on said shaft and arranged to be closed in rea mandrel including separable rotatable members arranged to be driven with said shaft, means responsive to operation of said clutch for successively moving said mandrel members to engage the ends of said strips,

Ainitiating rotation of said mandrel, cutting said conductive and insulation' strips one after the other, and stopping rotation of said mandrel, and means to open said clutch after the winding of said coil is initiated.

17. In a condenser winding machine of the type wherein the Winding operation is terminated in response to a predetermined capacity between conductive strips separated by strips of insulation, the combination of a shaft, a clutch mounted on said shaft and arranged to be closed in response to said capacity, a mandrel including laterally separable rotatable members arranged to be driven with said shaft, conductive and insulation feed rollers arranged to be driven with said shaft, means responsive to operation of said clutch for successively moving said mandrel members to engage the ends of said strips, initiating rotation of said mandrel, disengaging said stoprotation of said mandrel and laterally sepstrip feed rollers, engaging said feed rollers, Ping open saidclutch after the winding of said coil is 18. In a condenser winding machine of the type wherein the winding operation isterminated in response to a predetermined capacity lbetween .conductive strips separated by strips of insulation, the combination of a shaft, a clutch mouted on said shaft and arranged to be closedv in response to said capacity, a mandrel including separable rotatable members arranged to be driven with said shaft, conductive and insulation feed rollers arranged to be driven with said shaft, a plurality of cam means mounted on said shaft and responsive to operation of said clutch 'for successively moving said mandrel members to engage the ends of said strips, initiating rotation of said mandrel, disengaging said strip feed roll'- ers, engaging said feed rollers, cutting said conductive and insulation strips one after the other, stopping rotation of said mandrel and separating said mandrel members, and means to open said clutch after the winding of said coil is initiated.

19. In a condenser winding machine of the type wherein the winding operation is terminated in response to a predetermined capacity between conductive strips separated by strips of insulation, the combination of a shaft, a clutch mounted on said shaft and arranged to be closed in response to said capacity, a mandrel including separable rotatable members arranged to be driven with said shaft, conductive and insulation feed rollers arranged to be driven with said shaft, and cam means mounted on said shaft and responsive tooperation of said clutch for successively moving said mandrel members to engage the ends of said strips, initiating rotation of said mandrel, stopping rotation of said manl drel and separating said mandrel members.

20. In a condenser winding machine of the type wherein the winding operation is terminatedin response to a predetermined capacity between conductive strips separatedby strips of insulation, the combination of a shaft, a clutch mounted on said shaft and arranged to be closed in response to said capacity, a mandrel including separable rotatable members arranged to bedriven with said shaft, conductive and insulation feed rollers arranged to be driven with said shaft, cam means mounted on said shaft and responsive to operation of said clutch for successively moving said mandrel membersto engage the ends of said strips, initiating rotation of said mandrel, cutting said conductive and insulation strips one after the other, stopping rotation of said mandrel and separating said mandrel members, and means to open said clutch after the winding of said coil is initiated. f

21. In a condenser winding machine of the type wherein the winding operation is terminated in response to a predetermined capacity between ,conductive strips separated by strips of insula tion, the combination of a. shaft, a clutch mounted on said shaft, and arranged to be ,closed in response to said capacity, conductive and insulation feed rollers arranged to be driven with said shaft, Aand means responsive to operation of said clutch for successively diseugaging said stripr and insulation strips one winding operation-is terminated in,

response to a predetermined capacity between conductive strips separated by strips of insulation, the combination of a shaft, a clutch mounted on said shaft and arranged to be closed in response f to said capacity, conductive and insulation feed rollers arranged to be driven with said shaft, and cam means mounted 0n said shaft and responsive to closure of said clutch gaging said strip feed rollers, engaging saidstrip feed rollers, and cutting said conductive and insulation strips one after the other. I

23. In a condenser winding machine' of the type wherein the winding operation is terminated in response to a predetermined capacity between conductive strips separated by strips of insulation, mounted on said shaft and arranged to be closed in response to Vsaid capacity, and means responsive to closure of said clutch for cutting said conductive and insulation strips one after the for successively disen the combination of a shaft, a clutch 

